'ascii' codec can't encode character

[basnijholt]

Testing with the latest master. This is similar to #1222

hv.__version__
1.6.2-1000-gc1fdcde

import holoviews as hv
import numpy as np

hv.notebook_extension('matplotlib')
hv.plotting.mpl.MPLPlot.fig_rcparams['text.usetex'] = True


(hv.HoloMap({mu: hv.VLine(mu) for mu in range(10)}) +
 hv.HoloMap({mu: hv.Path((np.linspace(0, 1, 10), np.random.rand(10))) for mu in range(10)}))

error:

---------------------------------------------------------------------------
UnicodeEncodeError                        Traceback (most recent call last)
/opt/conda/envs/dev/lib/python3.6/site-packages/IPython/core/formatters.py in __call__(self, obj)
    305                 pass
    306             else:
--> 307                 return printer(obj)
    308             # Finally look for special method names
    309             method = get_real_method(obj, self.print_method)

/opt/conda/envs/dev/lib/python3.6/site-packages/holoviews/ipython/display_hooks.py in pprint_display(obj)
    236     if not ip.display_formatter.formatters['text/plain'].pprint:
    237         return None
--> 238     return display(obj, raw=True)
    239 
    240 

/opt/conda/envs/dev/lib/python3.6/site-packages/holoviews/ipython/display_hooks.py in display(obj, raw, **kwargs)
    220         html = element_display(obj)
    221     elif isinstance(obj, (Layout, NdLayout, AdjointLayout)):
--> 222         html = layout_display(obj)
    223     elif isinstance(obj, (HoloMap, DynamicMap)):
    224         html = map_display(obj)

/opt/conda/envs/dev/lib/python3.6/site-packages/holoviews/ipython/display_hooks.py in wrapped(element)
    147             if sys.version_info[0] < 3:
    148                 raise (t, v, tb)
--> 149             raise v.with_traceback(tb)
    150     return wrapped
    151 

/opt/conda/envs/dev/lib/python3.6/site-packages/holoviews/ipython/display_hooks.py in wrapped(element)
    114             html = fn(element,
    115                       max_frames=OutputMagic.options['max_frames'],
--> 116                       max_branches = OutputMagic.options['max_branches'])
    117 
    118             # Only want to add to the archive for one display hook...

/opt/conda/envs/dev/lib/python3.6/site-packages/holoviews/ipython/display_hooks.py in layout_display(layout, max_frames, max_branches)
    194                 return '<tt>'+ sanitize_HTML(layout) + '</tt>'
    195 
--> 196     return render(layout)
    197 
    198 

/opt/conda/envs/dev/lib/python3.6/site-packages/holoviews/ipython/display_hooks.py in render(obj, **kwargs)
     55     if renderer.fig == 'pdf':
     56         renderer = renderer.instance(fig='png')
---> 57     return renderer.html(obj, **kwargs)
     58 
     59 

/opt/conda/envs/dev/lib/python3.6/site-packages/holoviews/plotting/renderer.py in html(self, obj, fmt, css, comm, **kwargs)
    260         code to initialize a Comm, if the plot supplies one.
    261         """
--> 262         plot, fmt =  self._validate(obj, fmt)
    263         figdata, _ = self(plot, fmt, **kwargs)
    264         if css is None: css = self.css

/opt/conda/envs/dev/lib/python3.6/site-packages/holoviews/plotting/renderer.py in _validate(self, obj, fmt)
    196         if isinstance(obj, tuple(self.widgets.values())):
    197             return obj, 'html'
--> 198         plot = self.get_plot(obj, renderer=self)
    199 
    200         fig_formats = self.mode_formats['fig'][self.mode]

/opt/conda/envs/dev/lib/python3.6/site-packages/holoviews/plotting/renderer.py in get_plot(self_or_cls, obj, renderer)
    183             plot = self_or_cls.plotting_class(obj)(obj, renderer=renderer,
    184                                                    **plot_opts)
--> 185             plot.update(0)
    186         else:
    187             plot = obj

/opt/conda/envs/dev/lib/python3.6/site-packages/holoviews/plotting/mpl/plot.py in update(self, key)
    212         if len(self) == 1 and key == 0 and not self.drawn:
    213             return self.initialize_plot()
--> 214         return self.__getitem__(key)
    215 
    216 

/opt/conda/envs/dev/lib/python3.6/site-packages/holoviews/plotting/plot.py in __getitem__(self, frame)
    214         if not self.dynamic == 'open' and isinstance(frame, int) and frame > len(self):
    215             self.warning("Showing last frame available: %d" % len(self))
--> 216         if not self.drawn: self.handles['fig'] = self.initialize_plot()
    217         if not self.dynamic == 'open' and not isinstance(frame, tuple):
    218             frame = self.keys[frame]

/opt/conda/envs/dev/lib/python3.6/site-packages/holoviews/plotting/mpl/plot.py in initialize_plot(self)
   1041                                 title_obj, extra_artists,
   1042                                 vspace=self.vspace*self.fig_scale,
-> 1043                                 hspace=self.hspace*self.fig_scale)
   1044             colorbars = self.traverse(specs=[lambda x: hasattr(x, 'colorbar')])
   1045             for cbar_plot in colorbars:

/opt/conda/envs/dev/lib/python3.6/site-packages/holoviews/plotting/mpl/util.py in fix_aspect(fig, nrows, ncols, title, extra_artists, vspace, hspace)
    100     the size of the figure to match the aspect.
    101     """
--> 102     fig.canvas.draw()
    103     w, h = fig.get_size_inches()
    104 

/opt/conda/envs/dev/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py in draw(self)
    462 
    463         try:
--> 464             self.figure.draw(self.renderer)
    465         finally:
    466             RendererAgg.lock.release()

/opt/conda/envs/dev/lib/python3.6/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     61     def draw_wrapper(artist, renderer, *args, **kwargs):
     62         before(artist, renderer)
---> 63         draw(artist, renderer, *args, **kwargs)
     64         after(artist, renderer)
     65 

/opt/conda/envs/dev/lib/python3.6/site-packages/matplotlib/figure.py in draw(self, renderer)
   1141 
   1142             mimage._draw_list_compositing_images(
-> 1143                 renderer, self, dsu, self.suppressComposite)
   1144 
   1145             renderer.close_group('figure')

/opt/conda/envs/dev/lib/python3.6/site-packages/matplotlib/image.py in _draw_list_compositing_images(renderer, parent, dsu, suppress_composite)
    137     if not_composite or not has_images:
    138         for zorder, a in dsu:
--> 139             a.draw(renderer)
    140     else:
    141         # Composite any adjacent images together

/opt/conda/envs/dev/lib/python3.6/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     61     def draw_wrapper(artist, renderer, *args, **kwargs):
     62         before(artist, renderer)
---> 63         draw(artist, renderer, *args, **kwargs)
     64         after(artist, renderer)
     65 

/opt/conda/envs/dev/lib/python3.6/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2407             renderer.stop_rasterizing()
   2408 
-> 2409         mimage._draw_list_compositing_images(renderer, self, dsu)
   2410 
   2411         renderer.close_group('axes')

/opt/conda/envs/dev/lib/python3.6/site-packages/matplotlib/image.py in _draw_list_compositing_images(renderer, parent, dsu, suppress_composite)
    137     if not_composite or not has_images:
    138         for zorder, a in dsu:
--> 139             a.draw(renderer)
    140     else:
    141         # Composite any adjacent images together

/opt/conda/envs/dev/lib/python3.6/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     61     def draw_wrapper(artist, renderer, *args, **kwargs):
     62         before(artist, renderer)
---> 63         draw(artist, renderer, *args, **kwargs)
     64         after(artist, renderer)
     65 

/opt/conda/envs/dev/lib/python3.6/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1139 
   1140         for tick in ticks_to_draw:
-> 1141             tick.draw(renderer)
   1142 
   1143         # scale up the axis label box to also find the neighbors, not

/opt/conda/envs/dev/lib/python3.6/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     61     def draw_wrapper(artist, renderer, *args, **kwargs):
     62         before(artist, renderer)
---> 63         draw(artist, renderer, *args, **kwargs)
     64         after(artist, renderer)
     65 

/opt/conda/envs/dev/lib/python3.6/site-packages/matplotlib/axis.py in draw(self, renderer)
    262 
    263         if self.label1On:
--> 264             self.label1.draw(renderer)
    265         if self.label2On:
    266             self.label2.draw(renderer)

/opt/conda/envs/dev/lib/python3.6/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     61     def draw_wrapper(artist, renderer, *args, **kwargs):
     62         before(artist, renderer)
---> 63         draw(artist, renderer, *args, **kwargs)
     64         after(artist, renderer)
     65 

/opt/conda/envs/dev/lib/python3.6/site-packages/matplotlib/text.py in draw(self, renderer)
    796                     textrenderer.draw_tex(gc, x, y, clean_line,
    797                                           textobj._fontproperties, angle,
--> 798                                           mtext=mtext)
    799                 else:
    800                     textrenderer.draw_text(gc, x, y, clean_line,

/opt/conda/envs/dev/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py in draw_tex(self, gc, x, y, s, prop, angle, ismath, mtext)
    252         texmanager = self.get_texmanager()
    253 
--> 254         Z = texmanager.get_grey(s, size, self.dpi)
    255         Z = np.array(Z * 255.0, np.uint8)
    256 

/opt/conda/envs/dev/lib/python3.6/site-packages/matplotlib/texmanager.py in get_grey(self, tex, fontsize, dpi)
    582 
    583         if alpha is None:
--> 584             pngfile = self.make_png(tex, fontsize, dpi)
    585             X = read_png(os.path.join(self.texcache, pngfile))
    586 

/opt/conda/envs/dev/lib/python3.6/site-packages/matplotlib/texmanager.py in make_png(self, tex, fontsize, dpi)
    505         # see get_rgba for a discussion of the background
    506         if DEBUG or not os.path.exists(pngfile):
--> 507             dvifile = self.make_dvi(tex, fontsize)
    508             outfile = basefile + '.output'
    509             command = self._get_shell_cmd(

/opt/conda/envs/dev/lib/python3.6/site-packages/matplotlib/texmanager.py in make_dvi(self, tex, fontsize)
    397 
    398         if DEBUG or not os.path.exists(dvifile):
--> 399             texfile = self.make_tex(tex, fontsize)
    400             outfile = basefile + '.output'
    401             command = self._get_shell_cmd(

/opt/conda/envs/dev/lib/python3.6/site-packages/matplotlib/texmanager.py in make_tex(self, tex, fontsize)
    312             else:
    313                 try:
--> 314                     fh.write(s.encode('ascii'))
    315                 except UnicodeEncodeError as err:
    316                     mpl.verbose.report("You are using unicode and latex, but "

UnicodeEncodeError: 'ascii' codec can't encode character '\u2212' in position 229: ordinal not in range(128)

Out[1]:
:Layout
   .HoloMap.I  :HoloMap   [Default]
      :VLine   [x,y]
   .HoloMap.II :HoloMap   [Default]
      :Path   [x,y]

[philippjfr]

@basnijholt Since we're so close to release and you probably make the most use of rcParams would you mind testing #1300? I just want to make sure I'm not breaking anything else.

[philippjfr]

Thanks for reporting this and testing the fix!

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.